Heating apparatus



H. W. ODOWD HEATING APPARATUS.

APPLICATION FILED DEC. 11, 19121.

1 ,3 1 6,86 1 Patented Sept. 23, 1919 3 SHEETS-SHEET I.

$7 INVENTOR.

.; u an whom it may concern:

UNiTED STATES PATENT OFFICE.

HENRY W. OI DOWID, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO WILLIAM M. CRANE 4 COMPANY, A CORPORATION OF NEW YORK.

. HEATING APPARATUS.

.Lstcen .1.

Patented Sept. 23, 1919.

Be it known that I,'HENRY W. ODown,

" v a citizen of the United States, and a resident of Jerse City, county of Hudson, and State of ew Jersey, have made certain new and useful" Improvements-in Heating Apparatus, of which the followingis a specification.

The present invention relates to improvements in stoves of a certain type, disclosed by me in two prior patent applications,,re- 13 1915 and'Octo- In the applicationsv aforesaid are shown two forms of gas-stoves, provided each with upper and lower heat-generating chambers,

situated one above and the other below an The surplus flow ofintermediate oven. caloric. from the upper chamber, in each stove, is rendered available forheating the oven, with or without the aid of the \heat currents from the lower chamber. To this end, the currents and volatile results of combustion originatingin the upper chamber are arranged to pass out therefrom not only in a straight course, in a plane higher than that of the oven as usual, but also along a sinuous path leading around the latter into an additional dischargeflue located at the rear. On the other hand, the currents and products of combustion arising from the lower chamber are first led into the oven, and thence conveyed to the same discharge fine. The operation of these stoves, therefore. involves a dual method of heating, which is both direct and semidirect, as related to the'oven. The method is direct'as regards the utilization of the heat generated in the lower chambenand semi-direct, at least for part of the heat applied, in so far as the upper generating chamber is concerned. :As disclosed in the said patent applications, and likewise shown herein, the heat from the lower gencr' ating chamber passes up into the interior of the oven, either through the bottom or the sides thereof, and the cognate products of combustion, escaping through apertures ber intended for heating the 'oven is brought down through a circuitous channel or a plurality of channels coursing mostly external outlet.

about the exterior of the oven body, and the accompanying products of combustion are caused to mingle with those from the lower chamber while following the way out into the comm0n:discharge.

Among the several features that distinguish the present invention from its said prototypes is the, inclusion therein of a priming device, the object of which is to promote, draft from the upper heat-generating chamber of the stove through the indirect egress afforded by the channel or channels circuiting around the oven and terminating in its This device is rendered permanently operative by keeping the direct egress out of the upper chamber constantly. open within certain restricted limits, so that it is no longer required, as formerly, to open the door of the oven and operate a damper in the back flue for the purpose of allowing heat to pass out into the'latter from the upper chamber, thereby unbalancingthe weight of the air sufiiciently to relieve the pressure thereof on the indirect egress and eventually enabling the heat to flow downward through the same and around the oven.

Another salient feature, characteristic of the invention, resides in the transposition of the amper for the discharge flue from its accustomed placc'at the back to a point well forward of the oven,a change which secures the twofold advantage of maintaining a protracted contact of the heat currents from the lower generating chamber with the oven top, and of permitting a novel control of the. damper and oven door that precludes interference with the draft established for-the upper generating chamber, by leaving both its direct and indirect cgresses unobstructed at all times.

Other features, of greater or less importance, together with their respective objects and advantages, will be best understood and appreciated by reference to the following detailed description and the drawings hereto appended.

In the said drawings:

Figure 1 is a side sectional elevation of a stove or range wherein the said improvements are embodied, the section being on the irregular line 1+-1 of Fig. 2, looking toward the left;

accelerate, and maintain the Fig. 2 is a vertical section on the irregular line 22. of Fig. 1, looking to the right;

Fig. 3 is a sectional plan showing the upper part of the stove, the cooking top specification, it is sufficient to give a simple outline of the stove body, and therefore the drawings hereto annexed-represent it as con sisting merely of a plain quadrangular cas-.

.ing, 'as 11, rising from a correspondinglyshaped ,base 12, and having a flanged upper border 13, surrounding a removable cooking top or surface "14, with reducing ringsl5, and lid 16. Interiorly, the casing 11 maybe lined with asbestos sheets, as l or otherwise insulated in any approved manner;

In the center of the said casing, preferably, is placed the oven proper, consisting of a rectangular recipient having side plates 21, 22, top and bottom plates 23, 2,4, and a back plate 25, all of which are rigidly joined together and supported from the surrounding walls of thecasing. This oven may be of any convenient size or capacity, and, if pertaining to a hotel ran e, will usually be furnished with a plurality of removable shelves, (not shown), adapted to slide on and off opposite side rests, as 26, 27. A door 28, preferably of the drop type, spring cushioned and self-leveling, closes the oven in front, in the same manner as was described in the aforementioned patent applications.

Above the said oven is a heat chamber 31, which occupies nearly the entire space inside the upperportion of the casing 11 and is covered iip by the flanged border and cooking top previously described. Within this chamber may be located any suitable means designed to generate, develop, supply or receive the amount-of heat units necessary for the operation of the upper part of the stove. As the form of stove herein' illustrated, like the preceding forms, is well adapted for the economical use of gas as a fuel, the said chamber 31 has been represented in the drawings as fitted with a cluster of annular, concentric burners 32, which are respectively connected to a main supply-pipe 33, by separate feed-pipes 34, equipped each I with an air-mixer, as 35, and a valve, as 36-,

provided at or near their juncture with the said supply-pipe. The clusterof burners is shown resting on a seat 37, slidable centrally upon a plate 38, that extends horizontally planes of the ov'ehs side plates 21, 22, or prolongations thereof. A'layer of firebrick 39, or similar. refractory material, is placed heating the. oven described.

lengthwise from the front to the rear of the ing, at points coincident with the vertical upon the plate. 38 so as to surround the cluster 32 thereon, except at the middle front portion where the feed-pipes enter and lead from the supply-pipe to the several burners. It is understood that these burners can be lit singly, or conjointly, in divers combinations, or all collectively, to produce the heat required for cooking on the stoves surface, and that the latter is made removable to permit immediate exposure of the cooking utensils to the flaines. fMeanwhile the invention contemplates utilizing also .the same fire for thereunder, as will now be A direct egress out ofthe chamber 31 is first afforded to the volatile products of combustiomthrough an exit 41 in the back plate of the casing 11, and into a discharge com-- partinent 42, communicating therewith under the flanged border 13 at the rearof the stove. From the compartment-42 the products of combustion p'ass up through one or more slots or jet-openings,; as 43, formed within a flanged aperture 44in the rear border 13, to the flange of which aperture is fitted anoutlet-pipe 45. The latter may lead at once into the atmosphere or be connected to ac'himney, as preferred. The outward flow of the products of combustion is restricted or delayed, as will be seen, by the slot or slots 43, which in the embodiment of the invention shown in the accompanying drawings are produced by placing inside the flanged aperture 46 a funneleshaped duct or spout 46, more particularly referred to hereinafter. i Besidesthe direct egress abovespoken of,

the upper chambe'r3'1 has an indirect egress for the heat currents and combustion proclucts therein, the, same comprising vertical channels"49, 50, leading downwardly' from the chamber one by each side ofthe oven .a

horizontal channel 51- interconnecting the said vertical channels and extending under the oven therebetween; a vertical flue 52 in communication with this horizontal channel, at the rear of the stove; and an opening53 dischargingfrom the said flue into the aforesaid spout 46. As already stated, the spout 46 is placed within the flanged aperture 44,

hereinbefore mentioned as fitted with the outlet-pipe 45. The channels 49, 50 and "'51 are formed by partitions 54, 55 and 56, pref from the walls of the casing 11 and held in parallelism with the adjacent sides and bot tom of the oven, respectively. occup es a space left between the rear plate 25 of the oven and the back of the outer casing. .The opening 53 is made in the back of the casing, at the upper end of the line.

.from the upper chamber 31 are open and have a common outlet throu h the pipe 45, but the -outlet is differential in that the slot or-jet opening 43 is of less area than the passage offered by the'spout 46. The efiect of this constructionand arrangement is that when the burners 32 are lighted, a small amount of heat passes immediately into the discharge compartment 42, circulates around the spout 46 therein, and slowly escapes to the outlet 45 through the slot 43. The atmospheric column in the outlet is thereby unbalanced and a suction is produced on the underlying spout and flue, as the air in the latter becomes lightened, allowing a pull to be generated forthwith on the channels 49, 50 and 51, and thus drawingvery rapidly the heated products from'theupper chamber 31 down into these channels, thence up the flue 52,. and out through the openin 53, spout 46, and. pipe 45., Once the in irect course of the heat currents and products of burners, assuming that the stove or range is combustion has been established, it is automatically maintained by and in proportion to the flow of caloric from the cluster of kept properly covered, either with its own lid and rings or with utensils set intheir places.

Under the oven is another heat-generating chamber 57. Ihis lower chamber has been 1 shown in the annexed drawings as co'exten- 'sive with the entire bottom part of the casing 11, but the dimensions thereof may vary within any desirable limits. As illustrated, the chamber 57 is heated by a set of parallel burners 58, extending from the front of the casing to supports 59, located inside the same at the rear. Theset is suitably positioned over a floor plate 60, which may be insulated underneath, as at 61. Each burner in the set has its air-mixer 62, valve 63, and feed-pipe connection 64, with a supply-pipe 65. The heatand volatile products of combustion arising from this set of burners first impinge against the underside of the channel 51, previously mentioned, and thence are diverted in-to flue spaces 66, 67, provided between the side partitions 54, 55, also before mentioned, and the adjacent sides of the casing 11. These flue spaces thus overlap the channels 49 and 50, and they are placed in.

v thence they are made to enter a horizontal Prefward part of the top 23 to admit the heat currents and products of. combustion into the said passageway, which theyvfollow from the front to the rear, where similar openings are made for their escape into the back flue 52, through an extension 76 of the said plate 25. The flow from the lower chamber 57 consequently encounters and min les with the like flow from the upper cham er 31 in the vertical flue 52, from which the combined currents, chiefly volatile products of combustion, pass into the spout .46, b way of the exit 53, and off through the out et 45.

As the openin of the oven door would tend to retard tlie suction on the indirect egress for the currents and combustion prodnote from the upper chamber 31, if the openings 74 in the oven top also were left uncovered, a damper 79 is provided for these openings. This damper, is arranged to drop down by gravity, so as'to close the openings 74when the oven door is opened; and

it rises from the openings upon closing the oven door. As shown in Figs. 1 and 4, the said damper'is conveniently oscillated to raise it from the openings, by means of a a consequence the damper swings downward over the openings, thereby closing them and operating to maintain a steady draft, pull,

or suction en the aforementioned indlrect egress.

In its broaderaspect the invention is not limited to the precise details of construction and arrangement of arts herein shown and described, since manifestly the same can be varied in numerous ways without deviating from the fundamental principles of the invention or sacrificing any of its chief advantages.

I claim: 1. A stove including an oven, sources of heat located above and below said oven, flucs partly surrounding said even for conveying.

heat currents from the lower source into the oven, channels intermediate suld flucs and oven leading currents from the upper source down around the oven, an outlet for the products of combustion, and a primer in said outlet.

2. A stove including an oven, sources of heat located above and below said oven, flues partly surrounding'said oven for conveylng heat currents from the lower source. into the oven, channels intermediate said flues andoven leading currents from the upper source down around the oven, an outletvfor' partly surrounding said oven for conveying heat current from the lower source into the oven, channels intermediate said fines and;

oven leading currents from the upper source down around the oven, an outlet for the products of combustion, a primer insaid Outlet, and a cut-ofi' controlling the discharge fromone of said sources.

4. A stove including an oven apertured at the top and sides, a source of heat above and a source of heat below said oven, flues partly surrounding said oven for conveying currents from the lower source into said oven and from the upper source down around the sides thereof, a flue connecting the openings in the top of the oven and the side flues, and a damper associated with said openings.

, 5, A stove including an oven apertured at the top and sides, a source of heat above and a source of heat below said oven, flues partly surrounding said oven for conveying currents from the vlower source into said oven and from the upper source down around the sides thereof, a flue connecting the openings in the top of the oven and the side flues, and a damper associated with said openings, a door on said oven, said damper being normally open-and operable to close the openings when the oven door is i open,

Yes

*6. A stove including an oven apertured at the top and sides, a source of heat above and a sourceoii heat below said oven, flues partly surrounding said oven for conveying currents from the lower source into said oven and from the upper source down around the sides thereof, a flue connecting the openings in the top of the oven and the side fl ues, a damper associated with said openlngs, an indirect egress for the products of combustion from one of the sources of heat, and a direct egress associated" therewith and constitutinga primer.

7. A stove including, infcombination, an

oven, flues disposed around said oven, a cas-Q of heat, a lower source of heat, means direct ing heat currents from the lower source of' heat outside of said flue spaces and into. said oven, a direct and an indirect egress for the products of combustion, and means for di recting heat currents from the upper source of heat down around the oven and out through the indirect egress.

sourceof heat outside of said flue spaces and into said oven, a direct and an indirect for directing heat currents from the upper source of heat down around the' oven and out through the indirect egress, and means for directing heat currents from the lower relation thereto, said oven being provided withopenings in its side and top, an upper source of heat, a lower ource of heat, means directing heat currents from the lower egress for the products of combustion, means source of heat outside of said flue spaces and. 7

into said oven, a direct and an indirect egress for the products of combustion, means for directing heat currents? from the'upper source of heat'down around the oven and out through the indirect 'e ress, means for directing heat currents rom the lower source of heat over the top of the oven and commingling them with the products from the lower source of heat, and a primer disposed in the indirect egress.

10. A stove including, in combination, an oven, flues disposed around said oven, a casing-surrounding aid fines and in spaced relation thereto, said oven being provided with openings in its side and top, an upper source of heat, a lower source of heat, means directing heat currents from the lower source of heat outside of said flue-spaces and for directing heat currents from the upper source of heat down around the oven and out through the indirect egress, means for directing heat currents from the lower source of heat over the top of the oven and commingling them with the products from the. lower source of heat, a primer disposed in the indirect egress, and means for directing a portion of the heat currents from' the upper source of heat around said primer.

11. A stove comprising an oven provided with openings in its top and sides, flue spaces disposed around the sides and top of said ov-en, said top and side flues being'in communication, an. upper source of heat, a lower source of heat, a casing surrounding said oven and said sources of heat and in spaced relation to said flues, flue members.

directing heat currents from said lower source into said oven and out through the top thereof, a direct and an indirect egress for the products of combustion, means directing the products of combustion from the upper source of heat down around the oven, said products commingling at the indirect egress, and a primer disposed in the indirect egress.

12. A stove including an oven with an apertured top, an overlying flue adapted-t0 receive heat currents through the aperture therein, a damper controlling the passage of currents from the oven to said flue, means operating to open said damper upon the closing of the oven door, an external outlet, a heat. generatin chamber having an indirect egress to t e latter, and a primer in said outlet serving to promote a draft through" the indirect egress and the flue upon the opening of said damper.

13; A stove including an oven, a heat generating chamber thereabove, downwardly directed channels conveying currents from said chamber upon the sides, bottom, and

back of said oven exteriorly, a lower heat chamber, and upturned fiues leading currents from the latter into the oven on opposite sides thereof transversely of said channels. 14. A stove including a heat chamber with an upper exit, a discharge compartment re-' ceiving part of the currents directly therefrom, a. 'lower channel conveyin another part. of the currents indirectly om said chamber to said compartment, a spout to said channel rising within the compartment opposite said exit, a second heat chamber, means for leading currents from said heat chamber into the oven, and a flue conducting currents from the latter-named chamber into said spout.

15. A stove including an oven with an apertured top, a'heat chamber thcreabove,

a channel leading currents from said chamher down the s des, under the bottom, and up the back of said oven exteriorly, means discharging other currents of heat into-the inte- 1 16. A stove including an oven with apertures in its sides and top, a chamber below said oven suppl ing it with'heat interiorly through its said ateral apertures, a flue overlying said top in position to receive the currents passing through the oven from said chamber, an upper heat chamber, and a channel conveying currents from the latter upon the sides, bottom, and back of the oven exteriorly.

17. A stove including an oven with a ertured sides and top, a-lower heat cham r, flues discharging currents from said chamber into the inte ior, of said oven through its sides and thence above the top thereof, an upper heat chamber, and channels conveying currents from the latter exteriorly upon the oven within said flues.

18. A stove including an oven apertured at the sides and top for the passa e of heat therethrough, an upper heat cham er, channels adapted to convey currents from said chamber around the oven below'its said top exteriorly, a lower heat chamber, flues rising from said lower chamber adjacent to opposite channels, and flueways traversing the latter so as to discharge currents from said fiues into the oven throu h its side apertures.

In testimony whereo I have signed my name to this specification.

HENRY W. ODOWD.

Witnesses:

1 Gno. Wanna,

T. J Po'rrnn. 

